Device for rolling rods of veneer and the like



E. M. FRID July 18, 1944.

DEYZLCE FOR ROLLING RODS OF VENEER ,AND THE LIKE v Filed Nov. 15, 1941 2Sheets-Sheet 1 July 18, 1 944. r E. M. FRID 2,353,957

DEVICE FOR ROLLING RODS OF VENEER AND THE LIKE Filed Nov. 15 1941 2Sheets-Sheet 2 Fig.4;

Patented July 18, 1944 DEVICE FOR ROLLING RODS OF VENEER AND THE LIKEEric Mauritz Frid, Malung, Sweden Application November 15, 1941, SerialNo. 419,298

v In Sweden March 14, 1941 7 Claims.

It is known to manufacture rods of veneer and, the like by rolling theveneer coated with a binder, such as cold glue, on a core between threeor more rotating rollers, the surfaces of which are tangents to imaginedcircles having substantially the same diameter as those of the rodswhich one wants to manufacture.

In said method one has used an endless cloth web disposed around therollers in order to bring the veneer between the rollers.

However, said method is connected with the drawback that the cloth webis easily soiled by glue so that interruptions in the drive are caused.

This drawback is eliminated according to the present invention byproviding guide members to guide the veneer, said guide members enteringbetween the rollers. The guide members may be resilient, if-desired, andbe located in annular grooves in the rollers.

The invention is illustrated in the accompanying drawings, in which-Fig. 1 is a diagrammatical end view of one embodiment of the invention.Fig. 2 is a corresponding lateral view on a smaller scale with removedguide members, the left and the right portions of the figure showingdifferent arrangement of the grooves. Fig. 3 is a core for rollingconical rods. Fig. 4 is a cut-out veneer piece for conical rods. Fig. 5is an end view of another embodiment.

In the drawings the reference numeral I indicates a frame, in which in aknown way there are mounted three rollers 2, 3, 4 the surfaces of whichare tangents to imagined circles having substantially the same diameteras those of the rods which one intends to manufacture. In case conicalrods are to be manufactured the rollers may be conical or mounted at anangle to one another.

The rollers are provided with spaced annular grooves 5 which in thedifferent rollers may be located opposite one another, as shown to theright in Fig. 2, or displaced relatively to one another, as shown to theleft in Fig. 2. Between the rollers 2 and 3, 3 and 4, and 4 and 2 thereare provided resilient guide members 6, 1, and 8 respectively which inthe embodiment shown in Fig. l consist of curved springs which are sunkin the annular grooves 5 in a roller 3, 4 and 2 respectively and whichextend towards the adjacent roller 4, 2 and 3 respectively and serve toguide a veneer board 9 inserted for instance between the rollers 2 and 3so that said board rolls itself up to a tubular rod, which rolling maytake place on a rotatable core l0 between the rollers.

Fig. 4 shows a veneer piece 9 for rolling slightly conical rods whichmay be wound around the tapered core ill shown in Fig. 3. As will beseen, it is in the shape of a trapezium as at the thick end the rodcontains more veneer than at thethin end. In its turn each such veneerpiece can, in a known way, be composed of several veneer pieces placedone upon the other or edge at edge, the grains of said pieces extendingin different direction, for example diagonally or longitudinally. Theveneer pieces may be rolled in several windings or in such a way thateach piece just goes round the whole circumference. This is possiblethanks to the guide members.

In the embodiment shown in Fig. 5 the resilient guide members consist ofguide plates ll disposed in the grooves of the rollers, said platesbeing by means of springs l2 pressed in towards a core in providedbetween the rollers 2, 3, 4, and being at their inner ends provided withguide surfaces l3, I4 to guide an inserted veneer board from one rollerto the adjacent roller.

The rods having been wound and a rolling up core, if used, having beenremoved, the entire rod or certain parts thereof may be pressed to ovalshape, while the binder is still wet, and then be each adjacent pair ofrollers for guiding the sheet material from each roller to the nextroller.

2. In a device for rolling sheet material into the form of a tube, threeor more forming rollers, means for rotatably mounting said rollers withtheir surfaces externally tangent to a circle having a diametersubstantially equal to the diameter of the tube which it is desired tomanufacture, a core disposed between said rollers and substantiallyconcentric with said circle, and separate means extending between eachadjacent pair of rollers for guiding the sheet material from each rollerto the next roller and around said core, the guiding means beingresiliently urged toward said core.

3. In a device for rolling sheet material into the form of a tube, threeor more forming rollers, means for rotatably mounting said rollers withtheir surfaces externally tangent to a circle having a diametersubstantially equal to the diameter of the tube which it is desired tomanufacture, a core disposed between said rollers and substantiallyconcentric with said circle, and separate means extending between eachadjacent pair of rollers, each means also extending between an adjacentroller and said core, for guiding the sheet material from each roller tothe next roller and around said core, each guiding means beingresiliently urged against a roller and towards said core.

4. In a device for rolling sheet material into the form of a tube, threeor more forming rollers, means for rotatably mounting said rollers withtheir surfaces externally tangent to a circle having a diametersubstantially equal to the diameter of the tube which it is desired tomanufacture,

a core disposed between said rollers and substantially concentric withsaid circle, and a separate resilient arm extending between eachadjacent pair of rollers, each arm also extending between an adjacentroller and said core, for guiding the sheet material from each roller tothe next roller and around said core, the resiliency of each arm urgingit against one of said rollers and towards said core.

5. In a device for rolling sheet material into the form of a tube, threeor more forming rollers, each roller being provided with an annulargroove in the surface thereof, means for rotatably mounting said rollerswith their surfaces externally tangent to a circle having a diametersubstantially equal to the diameter of the tube which it is desired tomanufacture, and separate resiliently mounted means extending betweeneach adjacent pair of rollers for guiding the sheet material from eachroller to the next roller, each guide means being disposed in partwithin the groove of one of said rollers.

6. In a device for rolling sheet material into the form of a tube, threeor more forming rollers, each roller being provided with an annulargroove in the surface thereof, means for rotatably mounting said rollerswith their surfaces externally tangent to a circle having a diametersubstantially equal to the diameter of the tube which it is desired tomanufacture, a core disposed between said rollers and substantiallyconcentric with said circle, and a separate resilient arm extendingbetween each adjacent pair of rollers, each arm also extending betweenan adjacent roller and said core, for guiding the sheet material fromeach roller to the next roller and around said core, each arm beingdisposed in part within one of said grooves and the resiliency of thearms urging them against the bottoms of the grooves and towards saidcore.

7. In a device for rolling sheet material into the form of a tube, threeor more forming rollers, means for rotatably mounting said rollers withtheir surfaces externally tangent to a circle having a diametersubstantially equal to the diameter of the tube which it is desired tomanufacture, a core disposed between said rollers and substantiallyconcentric with said circle, an arm extending between each adjacent pairof rollers and having a curved inner end surface substantiallyconcentric with said circle for guiding the sheet material from eachroller to the next roller and around said core, and resilient means forurging the end surfaces of said arms towards said core.

ERIC MAURITZ FRID.

